船用捷联惯导系统的快速阻尼导航算法

Rapid damping navigation algorithm of marine strapdown inertial navigation system

为了消除船用捷联惯性导航系统中的舒勒周期振荡和傅科周期振荡,常用的方法是在水平回路引入阻尼网络。然而,引入阻尼网络之后,系统在达到稳定之前往往需要一个较长的调节时间。系统在调节时间内会有超调等现象,使得系统的性能无法保证。为了减少系统的调节时间,提出一种由逆向解算和正向解算形成的循环算法,导航计算机利用存储的信息在计算机内循环解算,以达到缩短调节时间的目的。最后利用计算机进行仿真实验,结果表明所提方法能够有效缩短阻尼调节时间。

In order to eliminate the Schuler periodic oscillation and Foucault periodic oscillation of the ma- rine strapdown inertial navigation system （SINS）, the damping equalizer in the level loop is introduced. Howev- er, after the introduction of damping equalizer, there will be a long settling time before the system achieves steady, during which the system will have overshoot phenomenon that makes the system performance cannot be guaranteed. In order to reduce the settling time, the backward calculation which forms round-robin algorithm with the forward calculation is proposed. The SINS uses the information stored in the computer to adjust the damping in the computer, which can make the system achieve steady fast. Finally, the computer simulation results show that the proposed method can effectively shorten the damping settling time.